Mex Flat A4

Inquiry Stock availability Technical data

Product name	Mex-Flat A4
Dimensions	5,5 x 40/50/60/70 mm
Torx	TX25
Steel type	Stainless Steel A4
Suitable for	Softwood, Thermowood, Hardwood
Usage	Decking, outdoor furniture, construction etc.

Description and Benefits of the Mex-Flat A4

Mex-Flat A4, made from austenitic stainless steel A4, is a screw specifically developed for fastening decking boards to wooden substructures.
The screw features a trilobular geometry, an extra reinforced shank, an additional driving thread, a Torx profile, and many other advantages.

Material Description – Stainless Steel A4

Suitable for woods with high tannin content, such as Cumaru, Merbau, Bangkirai, etc., as well as for thermowood and softwoods.
Surface treatment by passivation increases corrosion protection
Suitable for saline environments
Acid-resistant under certain conditions
Can be used in service classes 1, 2, and 3 (ČSN EN 1995-1-1)
Suitable for chlorinated environments to a limited extent

Mex-Flat A4 is intended for:

Softwood species

Spruce
Siberian Larch
Silesian Larch
Cedar
Pine (with and without pressure treatment)

Thermowood

Thermowood Pine
Thermowood Ash
Thermowood Spruce

Hardwood species – with high tannin content

Bangkirai
Massaranduba
Dark Red Meranti - Bukit
Merbau
Garapa
Ipé
Teak
Cumaru
Oak

Note: This recommendation may not apply to all usage scenarios. The properties and lifespan of the screw can be influenced by specific environmental conditions. Therefore, we recommend consulting with your dealer.

MEX-Flat A4 offer

Art. No.	Screw Name	Size	Torx	Packaging
5540A4FLAT	Mex-Flat-A4	5,5x40 mm	TX25	200 pcs + bit
5550A4FLAT	Mex-Flat-A4	5,5x50 mm	TX25	200 pcs + bit
5560A4FLAT	Mex-Flat-A4	5,5x60 mm	TX25	200 pcs + bit
5570A4FLAT	Mex-Flat-A4	5,5x70 mm	TX25	200 pcs + bit

During installation, it is recommended to pre-drill holes for the screws to ensure accuracy and reduce the risk of material damage.


With pre-drilling	Without pre-drilling

Why choose the Mex screw collection for wood?

Proven stainless steel screws guaranteeing 100% high-quality material
Optimized screw geometry for wooden decking, cladding and construction
Competitive pricing without compromising on quality
Comprehensive marketing support for partners
Full range of accessories for wooden terraces and facades (bits, drills, etc.)
Expertly trained agents in timber and steel, ensuring quality control
Multiple delivery options with online shipment tracking for full transparency
Large stock availability with fast responses to any volume request
Complete installation system with advanced accessories
CE-certified products ensure compliance with industry standards
Commitment to consumer education for informed purchasing decisions
Decades of experience in both Czech and international markets